// border-1px($color)
//   position: relative
//   &:after
//     display: block
//     position: absolute
//     left: 0
//     bottom: 0
//     width: 100%
//     border-top: 1px solid $color
//     content: ' '
// border-none()
//   &:after
//     display: none
// bg-image($url)
//   background-image: url($url + "@2x.png")
//   @media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3)
//     background-image: url($url + "@3x.png")
@mixin border-t-1px($color) {
  position: relative;
  &::before {
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    border-top: 1px solid $color;
    content: '';
  }
}

@mixin border-b-1px($color) {
  position: relative;
  &::after {
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-top: 1px solid $color;
    content: '';
  }
}

@mixin border-none() {
  &:after {
    display: none;
  }
}

@mixin bg-image($url) {
  background-image: url($url + "@2x.png");
  @media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3) {
    background-image: url($url + "@3x.png");
  }
}
